Type-writing machine.



R. Wx UHLIG. TYPE WRITING MACHINE. APPLICATION FILED JAN. 20,@910;

Patented Mar. 26, 1912.

UNITED STATES- RICHARD W. UHLIG, OF RUTHERFORD,

PATENT onirica.

NEW JERSEY, ASS-IGNOB TO UNDERWOOIJ TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-XN'RI'I'IN'G-y MACHINE.

specificaaimV of Letters Patent.

Patented Mar. 26, 1912.

To all tc/0m it my concern: Be it known that I, RIcHARn lV. UHLI'G, a citizen of the United States, residingr 1n "Rutherford, in the county of Bergen and the line-space wheel.

` of one or more provide an improved and great-ly simplified' positive locking or clutch mechanism for releasably connecting the line-space wheel and the platen wherein the interlocking of the clutch members is rendered certain and. diroot. the mechanism beingr easily and quickly applicable to existing machines Without changing other features thereof, and operated with ease and despatch.

Tt consists of but few parts readily assembled and disassembled, whereby its liability to lfet out of order is materially reduced.

The member of the clutch with which the line-space wheel is connected, comprises a bolt carrier in the form of a disk or annulus apertured to accommodate sp1-lng pressed bolts or bayonets movable toward and from a clutch member fast on the platen axle andprovided with a circular seriesv of seats preferably evenly spaced in which the inner ends ot one or more ot the bolts are projected to positively lock the platen and line space wheel together. To insure the entry bolts into the seats of the tast clutch member, the holt-s are arranged at unequal intervals from cach other opposite the circular series of seats, so, that in case one lot' the bolts does not register with its scatA 1n the fast clutch member, one 0r more of the. other bolts will. Thebolts are withdrawn by a finger piece to permit independent adjustment of the platen relative to ln the accompanying drawings, Figure 1 is a plan View ot' this invention applied to the Underwood type of writing machine, and partly broken away to .show the relation of the parts. Fig. 2 is a detail Side View .showing the relation of the bolts of the loose clutch member to the seats in the fast clutch vmember. Fig. 3 is a detail cross-sectional view showing the clutch released. Fig. 4 is a similar view showing the clutch in'normal position. F ig. 5 is adetail cross sectional view taken at right angles to Figs. 3 and 4. Fig. 6 is a detail perspective view, partly broken away, showing the operative parts of the invention disassembled.

The usual platen 1 is fixed upon an axle 2 j'ournaled in a platen frame, the ends of which are seen at 3, 4, -a linger knob 5 being secured upon one end of the axle which projects from the platen frame, for rotating the platen.

Mechanical line-Spacing of the platen is effected through a lever 6, slide 7, pawl 8 and liuc-spaoe wheel 9, the latter loosely mounted relative to'the platen. Said linespace wheel has. the usual springl detent 10. Upon'the line-space Wheel 9 is formed an forminga drum surrounding a clutch member 12 in the shape of-a disk fast on the axle, or on a tubular extension 13 thereof, said disk having a circular series of perforat-ions or seats 14 arranged in close proximity to one another'. These seats are arranged to be engaged by theends of one or more bolts 18 mounted in a. bolt carrier l5 fast to the lincspace wheel. These bolts serve to positively lock the platen and line-space wheel together.

The boltvcarrie-r 15 is fastened to the flange or rim 11 by screws 16,`taking into holes 16 in the bolt carrier, so thatthe bolt carrier practically constitutes a part of the rim ll and line-space wheel 9. The carrier is apertnred, as at.' 17 forming guideways :for the bolts 18, which bolts may be projected to enter the seatsllt located in the adjacent clutoh member 12.

engaged by a releasing head 19 capable of turning on and slidingr longitudinally of the axle or its sleeve 13. Said releasing head has a guide pin 20 whose free end enters a hole. 21 in the carrier 15 and guides the releasing headin its back and forth movement relative thereto. The extreme outer ends of the bolts are enlarged, as at 22, to be engaged by the releasing head, so that when the latter is drawn outward, itl will withdraw the bolts from the seats 14.- and free the platen from its line-space wheel and decent, thus permitting'independent rotationof the platen. Springs 23 normally The outer ends ot the bolts are looselyl annular laterally-extending flange or ri`m 1-1,

llO

project the bolts into engagement with 'the clutch member 12, as seen in Fig. 4. The

A apertures in the bolt carrier are constricted tspaced, it follows that prevent larly arranged, itm1ght happen that the inner ends of the bolts 18 might all rest on imnoyements may the septums between the seats '14 and fail to lock the linespace wheel and platen together. To avoid such a contingency, the bolts 18 are arranged at'unequal intervals (see Fig. 2) and the endsvwhich enter the seats 14 are pointed, so that if `one bolt strikes the member 12 between the seats 1l, another bolt 'will engage with and enter some one of said seats.

The releasing head is operated by a central stem 29 sliding back and forth in the tubular extension 13 on axle 2. Said stem projects beyond the finger knob 5 and terminates in a button 30 for manipulating the clutch. lWhen the buttonis pulled- Qutl ward, as in Fig.v 3, a bit 27 on its stein 29, which projects through a slot 28 in the axle into an internal groove 2G (see Fig. G) in the releasing-head, operates toV pull the releasing head 19 away from clutch member 12, and draws the bolts 18 from their seats 14,. This permits the platen 1 to be turned independently of the linespace wheel 9. A spring 81 returns the releasing head 19 to normal position, Fig. 4, thereby compressing the seating springs 23 to project one or more of the bolts into the seats of the elutch member 12 and hold them there. A latch comprising a check 32 to enter'one or the other of aV pair of recesses 33, 34: in the stem 29, will holdgthc releasing head 19 and with it the bolts in one'orthe other of their extreme positions. Said check is pressed against the stenby a spring 35 in a seat in the finger kliobl, held in place by a screw 3G.

Variations may be ,resorted to within the scopealof the invention, and portions of the be used Without. others.

:vinff thus described my invention, 1 vlail c attached to the .Anat`i"""` with a platen,

"spa-eef; lseats, a bolt carrier relatively to a line-space wheel ',"ltla typeniriting machine, the combiof a clutch member turn therewith and having equally whichf't'he -platen turns,

bolt carrier, uneqnally spaced bolts mounted in the bolt carrier to lock thelixed clutch member thereto, a releasing head mounted for longitudinal and rotary movement relatively to the platen.

.'by the releasing if the bolts are' simi4 springs interposed between the releasing head and the bolts to press the bolts toward the fixed clutch member, the bolts operated head, and a finger piece c0nnected with the releasing head to Control the engagement and disengagement of the bolts.

L2. In a typewriting machine, the combi nation with, a platen, a line-space wheel relative to .which the platen turns` line-space mechanism for operating theY wheel, and a detent for the wheel, of a clutch mechanism for positively locking the platen and linespace wheel together, including a disk fixed to turn with the platen, and provided with a circular series of seats arranged closely together, a bolt carrier with which the line space wheel is connected, a plurality of springpressed imeqnally spaced bolts in the bolt carrier, mounted to move toward and from the disk, the inner ends of the bolts being pointed, and a linger piece with which the bolts are connected.

3. The combination with a platen, of an axle fast to said platen and tast to a disk which faces a line-space Wheel for said platen, said line-space Wheel being loose on ,said axle and carrying an annulus extending on the opposite side of said disk, pins eX- tending parallel to saidaxle through said annulus and independently projectable into perforations in said disk to lock said 'disk to said linespace wheel, and a finger piece tor operating said pins.

4t. The combination with a platen., of an axle fast to said platen and fast to a disk which faces a linespace wheel tor said platen, said line-space wheel being loose on said axle and carrying an annulus extending on the opposite side of said disk, pins extending parallel to said axle through said annulns and independently projectable into perforatins in said disk to lock said disk to said line-space wheel, and a guide for the rear end of said pins holding them rigidly parallel to said axle.

The combination with a platen, of an axle 'fast to said platen and fast to a disk whiclrfaces a liuc-space wheel for said platen, said line-space wheel being loose on said axle and carrying an annulus ext-ending on the opposite side ot said disk. pins extending parallel to said axle through said annulus and perforations in said disk to lock said disk to said line-space wheel, a guide for the rear end of said pins holding them rigidly parallel to said axle. a linger piece for operating said pins, and a. detcnt holding said linger piece.

ltlGl-lAl-D W. UULG.

"itnes'scs RALPH S. Waaruit,

JOI-IN O. SE1-Fuer.

independently projectable into 

